Edis Kayalar, 26, reportedly walked into a police station in the southwestern city of Stuttgart late Monday. He has been charged with one count of extortion in the U.S. If convicted, he could face up to two years in prison.

The former supermodel, 43, and her husband Rande Gerber were the latest celebrities to be ensnared in an extortion drama involving a bizarre photo of their eight year-old daughter, Kaia.

Kayalar allegedly threatened to release the year-old photo -- which reportedly showed the girl bound to a chair and gagged. According to court papers, Kaia said that a former nanny took the picture as part of a "cops and robbers" game they were playing.